Adjustable standard and heel-knife



R. s. DAVIS.

ADJUSTABLE STANDARD AND HEEL KNIFE.

A APPLICATION FILED SEPT. I9, 1919.

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R. S. DAVIS.

ADJUSTABLE STANDARD ANDHEEL KNIFE.

APPLICATION I'ILED SEPT. 19. 1919.

Patented J uly 20, 1920.

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UNITED STATES ROBERT S.v DAVIS, 0F POWI-IATAN, LOUISIANA.

PMENTv OFFICE.

yADJUSTABLE STANDARD AND HEEL-KNIFE.

Specication of Letters Patent.

Patented July 2o, 1920.

Application led September 19, 1919. Serial No. 324,894.

To all whom #may concern.:-

Be it known that I, ROBERT S. Davis, a citizen of the `United States, residing at Powhatan, in the parish of Natchitoches, State of Louisiana, have invented a new rand useful Adjustable Standard and Heel- Knife; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

Theinvention relates to plows and has for its object to provide means whereby the standard and the heel knife may be easily and quickly adjusted so that the point of the plow may be raised or lowered thereby adjusting said plow in accordance with the dra-ft hitch so that the plow will take or throwa deeper furrowl or a shallow one according to the desire of the operator.

A further object is Lto provide a standard arching the plow beam, the upper end of said standard being provided withmeans whereby said end'may be moved forwardly or yrearwardly to lower or Vraise the plow 1 point and to provide a heel knife vpivoted to the standard vand connected to the adjusting means for the upper end of thestandard whereby the heel knife and the standard may be adj ustedV simultaneously.

.lVith the above and other objects in view the invention resides in the combination and arrangement of parts as hereinafter set forth, shown in the drawings, described and claimed, it being understood that changes in the precise embodiment of the invention may be made within the scope of what is claimed without departing from the spirit of the invention. f

In the drawings i Y Figure 1 is a side elevation of a portion of a plow beam showing the adjustable standard and heel knife applied thereto.

Fig. 2 is a top plan view of the adjustable standard and heel knife mechanism'. K

Fig. 3 is a vertical sectional view taken on line 3-3 of Fig. 1.

Fig. 4 is a vertical sectional view taken on line 4-4 of Fig. 1.

Referring to the drawing, the numeral 1 'designates a plow beam and 2 the standard,

tion from each other by -sleeves 4 disposed between said plates and through which sleeves and the plates, bolts 5 pass. Sleeves 4 are spaced above and below the plow beam 1 and are slightly spaced from the same to allow forward and rearward movement of the upper end of the standard during an adjusting operation. A conventional form of plowy 6 maybe secured in any suitable manner to the standard and the adjusting mechanismbeing particularly adapted to raise or lower the plow point 7.

The standard is pivotally mounted on a' bolt 8, which passes transversely through the plate 3 andthrough Vthe end 9 of a rearwardly and upv-.'ardly.extending brace 10, the upper end of said brace being secured as at 11 to the under face of the plow beam l by means'of a vertically-disposed bolt 12.`

heel knife 14. The bars 13 and the heel knife also have secured thereto by means of a bolt 17 upwardly extending arms 1S, the upper ends of said arms being pivotally secured as at 19 to' a U-shaped'arching plate 20, which arches the rearwardly and upwardly extending brace 10 and'is ladapted to have threaded into its upper end as at 21 the lower end 22 of a vertically disposed operating screw' 23 which screw is loosely mounted in a vertically Ydisposed aperture 24 which passes through the plow beam and through an aperture 25 in a lug 26, there being a nut 27 disposed between the lug 26 in the-upper face of the plow` beam thereby forming means whereby the threaded shaft 23 will move upwardly and downwardly when the wheel 28 is rotated. When the wheel 28 is rotated the square portion 29 of the vertical shaft 23 slides through a square aperture 30 in a bevel gear 31, the aperture 30 being of a size which will allow the square portion 29 to freely slidethrough the same. The lower end 22 of the vertical shaft 23 being threaded into the U-shaped member 20, it will be seen that the heel knife will incline forwardly or rearwardly according to the direction of turn of the wheel 28. It will also be seen that by pivoting the U-shaped arching plate 20 as at 19 that said U-shaped plate will accommodate the slight movement to one side or the other of the vertical center lineV of the threaded shaft 23 ofthe heel knife 'Y when said heel Vknife is moved upwardly or downwardly. During Vthe. rotation of the bevel gear 3l which is in mesh with theV proper furrow the heel knife is accordinglyY adjusted. Threaded shaft-33 passes through and is Vthreadedv in whichhas its pintles 38 in elongated bearings 39 in the 'upper endsof the plates 3; Vhen the adjusting mechanism is revolved so as to lower the Vplow point 7 or flatten theplow, it will beseen that it'will be possible by the same adjustment VAto'properly adjust the heel knife.

From the above it vwill be seen that an adjusting means has been provided for standards and heel knives wherein by theV Y single operation both members are adjusted l and'also the mechanism. wherein the comcomprising two members held in spaced replicated, slow and laborious use of wrenches is eliminated.v I

' The invention having been set forth what is claimed as new and useful is 1. An adjustable standard-and heel knife comprising a heel knife vcarrying .member carried by a plow beam, said knife carrying Y member being disposed below the plow'beam,

the lower end of the standard and the forA ward end of the knife carrying member being pivoted to each other, the standard lation'to each other and having their upper ends arching the plow beam, a bracket carried on the upperV face ofthe plow beam and having rotatably mounted inV bearings thereof a threaded shaft, said threaded shaft passing through a pivoted trui'inion block havingV bearings in the upper end of the standard, a gear carried by saidthreaded shaft, said gear meshing'with a gear carried by a a rockable bearing 37V vertically disposed threaded'shaft, the lower end of said vertically dispose-d threaded shaft being threaded ina member pivotally secured vto the knife carrying member, the

4gear carried byk the vertically disposedY threaded shaft being rotatablel with lsaid shaft but slidable thereon, and means whereby saidvertically disposed threaded shaft may be rotated to raise and lower the'plow point and simultaneously adjust Vthe heel knife carrying member, w l

2. An adjustable standard and heel knife comprising a knife carrying memberV carried by a plow beam, said knife carrying member being disposed below the plowbeam,

the lower end of the standard and thev forward end of theknife carrying member being pivoted on a common pivotal point,

said pivotal point being in an upwardly and rearwardly extending brace carriedfby the plow beam, the standard comprising two members held in spaced lrelation to each Y other and having their upper end arching the plow beam, a' bracket carried on the upper face of the plow-beam Vand having rotatably .mounted lin bearings thereof a threaded shaft, the rearl end of said threaded shaft having secured thereto a gear, Vsaid gear meshing with aibevel gear slidably mounted on a vertically disposed threaded shaftbut rotatable with' said shaft, the first mentioned threaded shaft passing through a pivoted tru'nnionv pivoted in bearings of the upper end of the side plates ofthe standard,

the vertically disposed threaded shaft` being threaded through a member carried by the plow beam and having its lower fend threaded into a pivoted member, said pivoted member being pivotally secured to heel Y knife carrying member and` means whereby said vertically disposed threadedfshaft may` be rotated for simultaneouslyYinclining the plowpoint and h eel knife carrying member; Intestimony whereof I have signed my name to this specification in the presence of two'subscribing witnesses.

ROBERT s. Davis.

Vitr-iesses: Y

PoMsY, W. F. l3UR1`IsrDE.-.l 

